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Stability hack. Under Solaris when KM_SLEEP is set kmem_cache_alloc()

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may not fail.  To get this behavior I'd added a retry to the shim layer
even though it is abusive to the VM, at least it should prevent the crash.
Additionally I added a proc counter so I can easily check how often this
is happening.  It should be fairly rare, but likely will get worse and
worse the longer the machine has been up.


git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@104 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
2008-05-09 21:21:33 +00:00
parent 04a479f706
commit 5c2bb9b2c3
3 changed files with 43 additions and 6 deletions
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include/sys/kmem.h
+6 -6
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@@ -32,7 +32,9 @@ extern atomic64_t kmem_alloc_used;
extern unsigned long kmem_alloc_max;
extern atomic64_t vmem_alloc_used;
extern unsigned long vmem_alloc_max;
extern int kmem_warning_flag;
extern atomic64_t kmem_cache_alloc_failed;
#define KMEM_HASH_BITS 10
#define KMEM_TABLE_SIZE (1 << KMEM_HASH_BITS)
@@ -351,11 +353,9 @@ __kmem_cache_create(char *name, size_t size, size_t align,
kmem_reclaim_t reclaim,
void *priv, void *vmp, int flags);
int
extern __kmem_cache_destroy(kmem_cache_t *cache);
void
extern __kmem_reap(void);
extern int __kmem_cache_destroy(kmem_cache_t *cache);
extern void *__kmem_cache_alloc(kmem_cache_t *cache, gfp_t flags);
extern void __kmem_reap(void);
int kmem_init(void);
void kmem_fini(void);
@@ -363,7 +363,7 @@ void kmem_fini(void);
#define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
__kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
#define kmem_cache_destroy(cache) __kmem_cache_destroy(cache)
#define kmem_cache_alloc(cache, flags) kmem_cache_alloc(cache, flags)
#define kmem_cache_alloc(cache, flags) __kmem_cache_alloc(cache, flags)
#define kmem_cache_free(cache, ptr) kmem_cache_free(cache, ptr)
#define kmem_cache_reap_now(cache) kmem_cache_shrink(cache)
#define kmem_reap() __kmem_reap()